Internal Fracture of Nickel-base Alloy718 in High Temperature Fatigue
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- KOBAYASHI Kazuo
- National Institute for Materials Science
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- YAMAGUCHI Koji
- National Institute for Materials Science
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- HAYAKAWA Masao
- National Institute for Materials Science
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- KIMURA Megumi
- National Institute for Materials Science
Bibliographic Information
- Other Title
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- Ni基超合金Alloy718の高温疲労における内部破壊
- Niキ チョウゴウキン Alloy718 ノ コウオン ヒロウ ニ オケル ナイブ ハカイ
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Abstract
We investigated the fatigue properties at high temperatures of fine grain and coarse grain nickel-base Alloy718.<BR>In the fine grain material, the fatigue strength normalized by the tensile strength was 0.51 at 107 cycles. In contrast, the fatigue strength of the coarse grain material was 0.32 at the same cycles, although the fatigue strengths in the range from 103 to 105 cycles are the same for both materials.<BR>The fracture appearances fatigued at around 106 cycles showed internal fractures originating from the flat facets of austenite grains for both materials. The difference in fatigue strength at 107 cycles between the fine and coarse grain materials could be explained in terms of the sizes of the facets from which the fractures originated.
Journal
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- Tetsu-to-Hagane
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Tetsu-to-Hagane 90 (1), 33-36, 2004
The Iron and Steel Institute of Japan
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Details 詳細情報について
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- CRID
- 1390001205184022016
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- NII Article ID
- 110001457668
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- NII Book ID
- AN00151251
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- ISSN
- 18832954
- 00211575
- http://id.crossref.org/issn/00211575
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- NDL BIB ID
- 6818236
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed